This is some great info on QR codes, I have been playing with the codes for a few weeks and have them for our yard signs and it works great. I attach the to the metal yard signs using magnet paper from Office Depot. The reader apps are free to down load to your smart phone, we use the Droid.
Today my staff and I were working with our eproperties website, trying to find ways to better our realtor's property websites. So, we began playing around with QR codes for specific properties. A QR code is a specific matrix barcode (or two-dimensional code) readable by dedicated QR barcode readers and camera phones. QR stands for "Quick Response" because they can be read quickly by a cell phone. The code consists of black modules arranged in a square pattern on a white background. The information encoded can be a text, a URL, or other data. The reason they are more useful than a standard barcode is that they can store and digitally present much more data. The other key feature is that you don't need a chunky hand-held scanner to scan them; many modern cell phones are able to scan them.
This is an example of what a QR Code looks like:
We were able to insert a QR code to one of our realtor's property websites. Then we downloaded a QR code reader app to our iPhone and we were able to take a picture of the QR code and instantly the property website with all its features was automatically downloaded and saved to our phone. That way someone interested in a property could visit that website anytime without the hassle of searching all over the internet. The website is what was encoded in the QR code.
This is such a great concept and something we hope will catch on to the public and aid our realtors in the long run. Realtors can add these QR codes to their lawn signs, personal websites, and property flyers. These codes can be added to practically anything and everything.